Police investigating the shooting of nine-year-old Olivia Pratt-Korbel in Liverpool have warned her killer: "We will not rest until we find you and we will find you."
Detective Chief Superintendent Mark Kameen, head of investigations at Merseyside Police, said the force was pursuing a "number of very positive lines of enquiry" following the murder on Monday.
He said that it was unclear if the gunman had fled overseas and added "we have had a number of names provided to us".
